Means for repairing worn rifled guns.



J. G. MALSTER.

MEANS FOR REPAIRING WORN RIFLED GUNS.

APPLICATION FILED JUNE 14, 1013,

1,127,268. Patented Feb.2, 1915.

lwuemtoz lionn CHARLES MALs'rmi, or STBOMSBURG, NEBRASKA.

MEANS ron REPAIRING worm RIFLE!) cams;

Specification of Letters Patent. Patented Feb, 2, 1915.

Application filed June 14, 1913. I Serial No. 773,i537.

T all whom it may concern:

Be it known that I, JOHN CHARLES MAL- s'rnn. citizen of the United States, residing at Stromsburg, in the county of Polk and State of Nebraska, have invented certain new and useful Improvements in Means for Repairing Worn Rified Guns, of which the following is a specification.

This invention relates to means for re pairing rifled guns and fire-arms of all descriptions.

The primary aim of the invention is to provide a simple means whereby the Worn barrel of a gun or fire-arm of any type whatsoever may be provided with a rifled surface, so as to act upon the bullet in equally as efficient a manner as when new. It has been proposed to accomplish. this result by variousmethods, all of which have proved unsatisfactory, however, due in my opinion, to the fact that in carryingout the various methods it is contemplated that the bore of the barrel be rifled for its entire length. I

By actual experiment I have found that in order to secure the best results and to impart the desired rotation to the bullet it sisted by the rifling as to have its velocity" is preferable that the bore of the barrel be rifled only at and adjacent the muzzle end of the barrel. This is no doubt true for the reason that before reaching the rifled portion of the bore the bullet has gained such-momentum that it w l not cfioirematerially retarded, and the rifling is allowed to act against the surface of thebullet with a cleaner out. Another decided advantage accruing from the feature of rifling only the muzzle end of the barrel is that the barrel is much easier to clean and is less likely to become leaded.

For a full understanding of the. invention reference is to be had to the following de- 7 scription and accompanying drawing, in

which Figure 1 is a vertical longitudinal sec-' tional view through a rifle barrel illustrating the device of the present invention in place therein. Fig. 2 is a vertical transverse sectional view on the line 2-2 of Fig. 1. Fig. 3 is an end elevation of the barrel. Fig. 4 is a perspective view of the muzzle end of the barrel.

Corresponding and like parts are referred to -in the following description, and

indicated in all the views of the accomportion of the barrel.

'panying drawing, by the same referencecharacters.

. In the drawing the barrel is indicated by the numeral 1 and the barrel illustrated'in the drawing is presumed to be a worn one, in which event it would be devoid. of well defined rifling, and, in the character of its bore, would more nearly resemble a smooth bore rifle thana rifled one. In preparing the barrel for theinsertion therein of the repairing device, embodying the invention, the barrel is bored or reamed out from its muzzle end for a fraction of. its length which, in the instance of the ordinary small caliber rifle, may be six inches, more or less. In boring out the barrel, as indicated at 2, a shoulder 3 is formed at the inner end of the bored length. After the barrel has been properly bored in the manner stated,- it 1s interiorl-y threaded immediately adjacent and at its muzzle end, as indicated at 4.

- The barrel is now ready for the insertion of the device of the present invention which is to restore it to its normal condition. i

The device mentioned above is in the nature of a tube 5, preferably of the same quality of metal as the barrel 1 and of a length equal to the length of the bored out Theexterior diameter of the tube. 5 is such that the tube will exactly fit within the muzzle end of the barrel with the interior end of the tube" resting against the shoulder 3, in the man ner shown in Fig. 1 of the drawing. The

bore of the tube is of the same diameter as the bore of the barrel at the breech-end, so that the surfaces of the bores of the barrel and tube, respectively, merge at the inner end ofthe tube, and no obstruction is oifered to the free passage of the bullet through the barrel.

The tube 5 is exterlorly threaded as indicated by the numeral 5, and after the unthreaded portion of the tube has been fitted into the bore of the barrel the tube is r0 tated so that its outer end will be threaded into the outer end of the barrel, by inserting the fingers of a suitable spanner wrench (not shown) into sockets 6 formed at diametrically opposite-points in the said outer end of the tube 5. It will be observed that the outer end of the tube is-flush with the outer end of the barrel when the tube is properly positioned within the barrel. The tube 5 has the surface of its bore rifled, as indicated at 7 and it is obvious that the rifling withm the tube 5 may be of any of the several types. Not only may the tube 5 be readily fitted into the barrel prepared for its insertion, but it may, when it is desired to clean the tube, be removed so that the cleaning operation may be readily and conveniently accomplished.

It' will be apparent from an examination of Fig. l of the drawings that the bullet passing through the barrelwill forthe major length of its barrel-travel contact with casmooth surface and its velocity when it reaches the inner end of the tube 5 will be such that its speed of travelwill not be ma-' terially' retarded by the rifling within the tube, but on the other hand the riflingwill act with a smooth cut upon the surface of the bullet, and it will not be likely that the tube or the barrel will become leaded, after repeated firing.

It is to be distinctly understood that the tube may be of any length found suitable for the purpose or best adapted for the particular type of gun for which it is design It is also' to be noted that the caliber of the rifle is in no way altered by the use of the tube h reiudeseri'bed, nor will-beits accuracy ztulfi T proper ly fitted within the bane v gHaymgrthus described the invention what is claimed as new is 4 1. The combination 'witha, firearm barrel, the riding of which and the bore of which at the muzzle endther'eof has been enlarged andprovide d with internal threads at its muzzle extremity and an internalannular shoulder at a point inwardly remote from said threads, of a rifled tube equal in length to and inserted in the enlargedportion ofthe borerof the barrel with its inner end fitting against the internal an nular shoulder and provided at its outer end with external threads to engage the internal threads at the muzzle extremity of the barrel, the inner surface of the tube being flush with the inner surface of the barrel its length, of a rifled tube, equal in length to the enlarged portion of the bore, inserted in the said enlarged portion and arranged with its inner end fitting against the internal annular shoulderand its outer end flush with the outer end of the barrel, and external threads formed adjacent the outer terminal of the tube for engagement with the internal threads of the enlar ed portion of the bore, the wall of the tube% v ness and external diameter throughout its length except at the threaded portion which a is of greater external diameter than the other portion of the tube. Intestimony whereof I aflix my signature in presence of two witnesses.

J. CHARLES MALSTER. [1,. 8.]

Witnesses:

A. E. Gmvas, E. CWNORDLUND.

eing of uniformthick-. 

